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Lithium

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Nearly everybody knows about lithium – a light, silvery alkali metal – used in rechargeable batteries powering everything from laptops to hybrid cars. What  may not be so well known is the fact that researchers hoping to harness the energy released in fusion reactions also have used lithium to coat the walls of donut-shaped tokamak reactors. Lithium, it turns out, may help the plasmas fueling fusion reactions to retain heat for longer periods of time. This could improve the chances of producing useful energy from fusion.

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